var HttpRequestObject = false;
if(window.XMLHttpRequest) {
   HttpRequestObject = new XMLHttpRequest();
}
else if(window.ActiveXObject) {
   HttpRequestObject = new ActiveXObject("Microsoft.XMLHTTP");
}
function startProgress(uid) {
   //document.getElementById('upload').style.display = 'none';
   document.getElementById('pb_outer').style.display = 'block';
   setTimeout('getProgress("' + uid + '")', 1000);
}
function getProgress(uid) {
   if(HttpRequestObject) {
      HttpRequestObject.open('GET', 'getprogress.php?uid=' + uid, true);
      HttpRequestObject.onreadystatechange = function() {
         if(HttpRequestObject.readyState == 4 && HttpRequestObject.status == 200) {
            var progress = HttpRequestObject.responseText;
            document.getElementById('pb_inner').style.width = progress + '%';
            document.getElementById('pb_inner').innerHTML = progress + '%';
            if(progress < 100) {
               setTimeout('getProgress("' + uid + '")', 300);
            }
            else {
               document.getElementById('pb_inner').innerHTML = 'Upload Complete!';
            }
         }
      }
      HttpRequestObject.send(null);
   }
}